<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>权限列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 按钮 -->
    <el-row>
      <el-col><el-button type="primary">添加角色</el-button></el-col>
    </el-row>
    <!-- 表格 -->
    <el-table :data="rolesList" border stripe>
      <el-table-column type="expand">
        <template slot-scope="scope">
          <el-row
            v-for="(item1, i1) in scope.row.children"
            :key="item1.id"
            :class="['bdbottom', i1 == 0 ? 'bdtop' : '', 'vcenter']"
          >
            <!-- 一级 -->
            <el-col :span="5">
              <el-tag closable @close="removeRight(scope.row, item1.id)">{{
                item1.authName
              }}</el-tag>
              <i class="el-icon-caret-right"></i>
            </el-col>

            <el-col :span="19">
              <el-row
                v-for="(item2, i2) in item1.children"
                :key="item2.id"
                :class="[i2 == 0 ? '' : 'bdtop', 'vcenter']"
              >
                <!-- 二级 -->
                <el-col :span="6">
                  <el-tag
                    type="success"
                    closable
                    @close="removeRight(scope.row, item2.id)"
                    >{{ item2.authName }}</el-tag
                  >
                  <i class="el-icon-caret-right"></i>
                </el-col>
                <!-- 三级 -->
                <el-col :span="18">
                  <el-tag
                    type="warning"
                    closable
                    @close="removeRight(scope.row, item3.id)"
                    v-for="item3 in item2.children"
                    :key="item3.id"
                  >
                    {{ item3.authName }}
                  </el-tag>
                </el-col>
              </el-row>
            </el-col>
          </el-row>
        </template>
      </el-table-column>

      <el-table-column type="index"> </el-table-column>

      <el-table-column prop="roleName" label="角色名称"> </el-table-column>

      <el-table-column prop="roleDesc" label="角色描述"> </el-table-column>

      <el-table-column width="300px" label="操作">
        <template slot-scope="scope">
          <el-button type="primary" icon="el-icon-edit" size="mini"
            >编辑</el-button
          >
          <el-button type="danger" icon="el-icon-delete" size="mini"
            >删除</el-button
          >
          <el-button
            type="warning"
            icon="el-icon-setting"
            size="mini"
            @click="showSetRightDialog(scope.row)"
            >分配权限</el-button
          >
        </template>
      </el-table-column>
    </el-table>

    <!-- 对话框 -->
    <el-dialog title="提示" 
    :visible.sync="setRightDialogVisible" 
    width="50%"
    @close="resetRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      rolesList: [],
      setRightDialogVisible: false,
      rightslist: [],
      treeProps: {
        label: "authName",
        children: "children",
      },
      defKeys: [],
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get("roles")
      if (res.meta.status !== 200) {
        return this.$message.error("获取失败")
      }
      this.rolesList = res.data
    },
    async removeRight(role, rightsId) {
      const confirmResult = await this.$confirm(
        "此操作将永久删除该角色, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err)
      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除")
      }
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightsId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error("删除失败")
      }
      role.children = res.data
    },
    async showSetRightDialog(role) {
        this.roleId = role.id
      const { data: res } = await this.$http.get("rights/tree")
      if (res.meta.status !== 200) {
        return this.$message.error("获取失败")
      }
      this.rightslist = res.data
      //   调用递归：
      this.getLeafKeys(role, this.defKeys)

      this.setRightDialogVisible = true
    },

    // 递归：
    getLeafKeys(node, arr) {
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach((item) => this.getLeafKeys(item, arr))
    },
    resetRightDialogClosed() {
        this.defKeys = []
    },
    async allotRights() {
        const keys = [
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        const idStr = keys.join(',')
        const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr})
        if(res.meta.status !==200) {
            return this.$message.error('分配失败')
        }
        this.getRolesList()
        this.setRightDialogVisible = false
        this.$message.success('分配成功')
    }
  },
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>